This article also wasn't actually talking about adoption of python 3, just applying the stages of grief to how people feel about it. IOW, adoption of python 3 might still be worse than 20%, but 20% have accepted that they will need to adopt it soon.
Anecdotally as a full time python guy, I'd agree with the OP. The number of people interested in Python 3 has been growing a bit every year, and it seems opposition to adopting it at all has finally mostly dwindled :)